fix(vst): zone-bleed (3a) — reconcile the Sample-face zone on load so the loaded sample zone is the one first-match resolve plays

src/vst/sample_map.cpp

@@ -235,6 +235,27 @@ ResolvedPerformance resolvePerformance(const std::string& banksJson,
     return out;
 }
 
+bool reconcileSingleCaptureZones(PerformanceMap& map, const std::string& selectedId) {
+    if (selectedId.empty() || map.zones.empty()) return false;
+    for (const PerformanceZone& z : map.zones) {
+        // An authored key range marks Zone-view intent — first-match order is load-bearing
+        // there, so the map is left exactly as authored.
+        if (z.lowNote != 0 || z.highNote != 127) return false;
+    }
+    // Every zone is full-range: the map is purely Sample-face-shaped. Keep only the first
+    // zone bound to the selection (preserving its params); drop the stale shadowers.
+    // Decide BEFORE mutating so the no-change path leaves the map bit-identical.
+    std::size_t keepIdx = map.zones.size();  // size() = no zone for the selection
+    for (std::size_t i = 0; i < map.zones.size(); ++i) {
+        if (map.zones[i].sampleId == selectedId) { keepIdx = i; break; }
+    }
+    const std::size_t keptCount = (keepIdx < map.zones.size()) ? 1u : 0u;
+    if (keptCount == map.zones.size()) return false;  // one zone, already the selection's
+    if (keptCount == 1 && keepIdx != 0) map.zones[0] = std::move(map.zones[keepIdx]);
+    map.zones.resize(keptCount);
+    return true;
+}
+
 Keymap buildZonedKeymap(const std::vector<ResolvedZone>& zones,
                         const std::vector<DecodedZonePcm>& decoded) {
     Keymap km;